Sikorsky's fascination with rotorcraft began in the early 1930s. He envisioned a flying machine that could take off and land vertically, hover, and maneuver with ease. After years of experimentation and prototyping, Sikorsky designed and built the VS-300, the first successful single-rotor helicopter. On September 14, 1939, the VS-300 made its maiden flight, piloted by Sikorsky himself.